Shuttling between films shootings and dinner with Bill Clinton has kept Bollywood megastar Amitabh Bachchan on his toes this week.

As the week began, he flew down to Rajasthan to start shooting for Vidhu Vinod Chopra's film.

"There's no mobile network, no direct communication there. So I'm cut off... I flew down to Lucknow Wednesday to meet Bill Clinton. I asked my producer for a day off and worked overnight to make up for lost time."

And how was the experience of meeting the former US president?

"Very nice. It was a dinner hosted by Uttar Pradesh Chief Minister Mulayam Singh Yadav. (Wife) Jaya, (son) Abhishek and I attended the dinner. Earlier, I had met Clinton's wife Hillary in Delhi when she came down for the India Today conclave.

"We both spoke though on two different subjects. I believe someone from her staff was quite fond of my films."

AB says he did not get a chance to ask Clinton if he had seen his films although he had been briefed about the actor. But he reminded that he had something in common with Clinton - social causes.

"Clinton has taken a global initiative on AIDs and tsunami casualties. I've been involved with AIDS and polio work. So we had a common interest."

But since it was an informal dinner with a multitude of people, the two did not get a chance to interact personally. "But yes, it was a pleasant experience," said Bachchan.

Now AB is back in Rajasthan shooting for Vinod Chopra's film. He is also shooting almost back-to-back for Karan Johar's "Kabhi Alvidaa Na Kehna". The two films are completely different, he feels.

"Very different films, very dissimilar in mood content and characterization. I'm the central character in Vinod Chopra's film while I'm just one of many characters in Karan's film."

The Big B admits he and Vinod Chopra had wanted to work together for "years and years" but somehow nothing panned out.

"(Chopra) came to me for his first film and has returned ever since with one offer or another. Nothing worked out until this one. I wrap up Vinod's film in Rajasthan in two months and then I join Karan's unit in New York."

The 60-plus actor is undeterred by the punishing schedule.

"These are commitments that need my attention. And I enjoy being part of units as diverse as Vinod Chopra and Karan Johar."